How to use the jsonpickle.util.is_list function in jsonpickle

def test_is_list_other(self):
        self.assertFalse(util.is_list(1))
        self.assertFalse(util.is_set(1))
        self.assertFalse(util.is_tuple(1))

def test_is_list_list(self):
        self.assertTrue(util.is_list([1, 2]))

restore = self._restore_id
        elif has_tag(obj, tags.REF):  # Backwards compatibility
            restore = self._restore_ref
        elif has_tag(obj, tags.ITERATOR):
            restore = self._restore_iterator
        elif has_tag(obj, tags.TYPE):
            restore = self._restore_type
        elif has_tag(obj, tags.REPR):  # Backwards compatibility
            restore = self._restore_repr
        elif has_tag(obj, tags.REDUCE):
            restore = self._restore_reduce
        elif has_tag(obj, tags.OBJECT):
            restore = self._restore_object
        elif has_tag(obj, tags.FUNCTION):
            restore = self._restore_function
        elif util.is_list(obj):
            restore = self._restore_list
        elif has_tag(obj, tags.TUPLE):
            restore = self._restore_tuple
        elif has_tag(obj, tags.SET):
            restore = self._restore_set
        elif util.is_dictionary(obj):
            restore = self._restore_dict
        else:
            def restore(x):
                return x
        return restore(obj)

[1, 2, 3, 4]
        >>> p.flatten((1,2,))[tags.TUPLE]
        [1, 2]
        >>> p.flatten({'key': 'value'})
        {'key': 'value'}
        """

        self._push()

        if self._depth == self._max_depth:
            return self._pop(repr(obj))

        if util.is_primitive(obj):
            return self._pop(obj)

        if util.is_list(obj):
            return self._pop([ self.flatten(v) for v in obj ])

        # We handle tuples and sets by encoding them in a "(tuple|set)dict"
        if util.is_tuple(obj):
            return self._pop({tags.TUPLE: [ self.flatten(v) for v in obj ]})

        if util.is_set(obj):
            return self._pop({tags.SET: [ self.flatten(v) for v in obj ]})

        if util.is_dictionary(obj):
            return self._pop(self._flatten_dict_obj(obj, obj.__class__()))

        if util.is_type(obj):
            return self._pop(_mktyperef(obj))

        if util.is_object(obj):

restore = self._restore_id
        elif has_tag(obj, tags.REF): # Backwards compatibility
            restore = self._restore_ref
        elif has_tag(obj, tags.ITERATOR):
            restore = self._restore_iterator
        elif has_tag(obj, tags.TYPE):
            restore = self._restore_type
        elif has_tag(obj, tags.REPR): # Backwards compatibility
            restore = self._restore_repr
        elif has_tag(obj, tags.REDUCE):
            restore = self._restore_reduce
        elif has_tag(obj, tags.OBJECT):
            restore = self._restore_object
        elif has_tag(obj, tags.FUNCTION):
            restore = self._restore_function
        elif util.is_list(obj):
            restore = self._restore_list
        elif has_tag(obj, tags.TUPLE):
            restore = self._restore_tuple
        elif has_tag(obj, tags.SET):
            restore = self._restore_set
        elif util.is_dictionary(obj):
            restore = self._restore_dict
        else:
            restore = lambda x: x
        return restore(obj)

def _get_flattener(self, obj):

        if PY2 and isinstance(obj, file):
            return self._flatten_file

        if util.is_primitive(obj):
            return lambda obj: obj

        if util.is_bytes(obj):
            return self._flatten_bytestring

        list_recurse = self._list_recurse

        if util.is_list(obj):
            if self._mkref(obj):
                return list_recurse
            else:
                self._push()
                return self._getref

        # We handle tuples and sets by encoding them in a "(tuple|set)dict"
        if util.is_tuple(obj):
            if not self.unpicklable:
                return list_recurse
            return lambda obj: {tags.TUPLE: [self._flatten(v) for v in obj]}

        if util.is_set(obj):
            if not self.unpicklable:
                return list_recurse
            return lambda obj: {tags.SET: [self._flatten(v) for v in obj]}

restore = self._restore_id
        elif has_tag(obj, tags.REF):  # Backwards compatibility
            restore = self._restore_ref
        elif has_tag(obj, tags.ITERATOR):
            restore = self._restore_iterator
        elif has_tag(obj, tags.TYPE):
            restore = self._restore_type
        elif has_tag(obj, tags.REPR):  # Backwards compatibility
            restore = self._restore_repr
        elif has_tag(obj, tags.REDUCE):
            restore = self._restore_reduce
        elif has_tag(obj, tags.OBJECT):
            restore = self._restore_object
        elif has_tag(obj, tags.FUNCTION):
            restore = self._restore_function
        elif util.is_list(obj):
            restore = self._restore_list
        elif has_tag(obj, tags.TUPLE):
            restore = self._restore_tuple
        elif has_tag(obj, tags.SET):
            restore = self._restore_set
        elif util.is_dictionary(obj):
            restore = self._restore_dict
        else:
            restore = lambda x: x
        return restore(obj)

[1, 2, 3, 4]
        >>> p.flatten((1,2,))[tags.TUPLE]
        [1, 2]
        >>> p.flatten({'key': 'value'})
        {'key': 'value'}
        """

        self._push()
        
        if self._depth == self._max_depth:
            return self._pop(repr(obj))

        if util.is_primitive(obj):
            return self._pop(obj)

        if util.is_list(obj):
            return self._pop([ self.flatten(v) for v in obj ])

        # We handle tuples and sets by encoding them in a "(tuple|set)dict"
        if util.is_tuple(obj):
            return self._pop({tags.TUPLE: [ self.flatten(v) for v in obj ]})

        if util.is_set(obj):
            return self._pop({tags.SET: [ self.flatten(v) for v in obj ]})

        if util.is_dictionary(obj):
            return self._pop(self._flatten_dict_obj(obj, obj.__class__()))

        if util.is_type(obj):
            return self._pop(_mktyperef(obj))

        if util.is_object(obj):

# ignore the reserved attribute
                if k in tags.RESERVED:
                    continue
                self._namestack.append(k)
                # step into the namespace
                value = self.restore(v)
                if (util.is_noncomplex(instance) or
                        util.is_dictionary_subclass(instance)):
                    instance[k] = value
                else:
                    instance.__dict__[k] = value
                # step out
                self._namestack.pop()
            return self._pop(instance)

        if util.is_list(obj):
            return self._pop([self.restore(v) for v in obj])

        if has_tag(obj, tags.TUPLE):
            return self._pop(tuple([self.restore(v) for v in obj[tags.TUPLE]]))

        if has_tag(obj, tags.SET):
            return self._pop(set([self.restore(v) for v in obj[tags.SET]]))

        if util.is_dictionary(obj):
            data = {}
            for k, v in obj.iteritems():
                self._namestack.append(k)
                data[k] = self.restore(v)
                self._namestack.pop()
            return self._pop(data)